Environmental Presentation Slide Design

1
Heavy Duty OBD Issues Clean Diesel
Implementation Workshop August 6, 2003
Presented By John Trajnowski Vehicle
Environmental Engineering Ford Motor Company
2
HDOBD Regulatory Development Update

• ARB recently proposed new OBD requirements for
  all trucks over 14,000 lb. GVWR.
• EPA is expected to initiate a rulemaking for
  federal heavy duty trucks in the near future.

3
ARB HDOBD - Rulemaking Timetable

• ARB Workshop to discuss their proposed heavy duty
  OBD II requirements will probably be held in
  September.
• The regulation is scheduled to be considered for
  adoption at the November, 2003 ARB Board Hearing.

4
ARB HDOBD Proposed Requirements

• ARBs proposal very similar to the LD/MDV OBD II
  requirements.
• Monitoring required for all emissions-related
  systems and components on the vehicle.
• Rate-based monitoring will be required to ensure
  monitors execute on a regular basis.
• Regulation will require a standardized
  communication protocol for the OBD II system.

5
ARB HDOBD - Implementation

• ARB proposed to require HDOBD on heavy duty
  trucks beginning with the 2007 model year.
• Phase-in of 30/60/100 in 2007/08/09.

6
ARB HDOBD Major Issues

• Vehicle-based monitoring requirements.
• Not limited to engine. Includes transmission.
• Non-engine driveline malfunctions have negligible
  emissions impact.
• OBD II requirements apply to vehicle model year
  rather than engine model year.

7
ARB HDOBD Major Issues

• 2007 MY implementation date is problematic.
• Major workload already facing HD truck engine
  manufacturers in 2007 to comply with new
  emissions requirements.
• Purpose unclear for potential new AECD/NTE zone
  tracking requirements.
• Requirement unrelated to detecting malfunctions.
• How would ARB plan to use this information?
• Would this requirement be cost effective from an
  air quality perspective?

8
ARB HDOBD Other Potential Concerns

• There will be significant cost implications if
  ARB requires a communication protocol other than
  what is currently in use.
• SAE J1939 for diesel engines in large trucks.
• ISO 15765-4 (LD protocol) for engines used in
  lighter trucks derived from LD/MDVs.
• Aftertreatment monitoring requirements are
  technology-forcing and create a compliance risk.

9
ARB HDOBD Enforcement Concerns

• ARB plans to propose HDOBD enforcement provisions
  in a separate rulemaking.
• Light Duty OBD II enforcements regulations
  contain mandatory recall provisions.

10
ARB HDOBD Other Potential Concerns

• ARBs Policy You cannot use certain emissions
  control technology if you cant monitor it.
• Policy could impact engine manufacturers ability
  to meet emissions requirements.